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Datasheet File OCR Text: |
this is preliminary information on a new product foreseen to be developed. details are subject to change without notice. september 2013 docid025102 rev 2 1/18 VNH5250AS-E automotive fully integrated h-bridge motor driver datasheet - target specification features ? output current: 8 a ? 3 v cmos-compatible inputs ? undervoltage shutdown ? overvoltage clamp ? thermal shutdown ? cross-conduction protection ? current and power limitation ? very low standby power consumption ? protection against loss of ground and loss of v cc ? current sense output proportional to motor current ? output protected against short to ground and short to v cc ? package: ecopack ? description the VNH5250AS-E is a full bridge motor driver intended for a wide range of automotive applications. the device incorporates a dual monolithic high-side driver and two low-side switches. both switches are designed using stmicroelectronics? well known and proven proprietary vipower ? m0 technology that allows to efficiently integrate on the same die a true power mosfet with an intelligent signal/protection circuitry. the three dies are assembled in so-16n package on electrically isolated leadframes. this package, specifically designed for the harsh automotive environment offers improved thermal performance thanks to exposed die pads. moreover, its fully symmetrical mechanical design allows superior manufacturability at board level. the input signals in a and in b can directly interface to the microcontroller to select the motor direction and the brake condition. the diag a /en a or diag b /en b , when connected to an external pull- up resistor, enables one leg of the bridge. each diag a /en a provides a feedback digital diagnostic signal as well. the normal operating condition is explained in the truth table. the cs pin allows to monitor the motor current by delivering a current proportional to its value. type r ds(on) i out v ccmax VNH5250AS-E 250 m typ ( per leg) 8a 41v so-16n gapgcft00648 table 1. device summary package order codes tube tape and reel so-16n VNH5250AS-E vnh5250astr-e www.st.com
contents VNH5250AS-E 2/18 docid025102 rev 2 contents 1 block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3 package and packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.1 ecopack ? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.2 so-16n mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 docid025102 rev 2 3/18 VNH5250AS-E list of tables 3 list of tables table 1. device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 table 2. block description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 table 3. pin definitions and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 table 4. pin functions description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 table 5. absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 table 6. thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 table 7. power section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 table 8. logic inputs (ina, inb, ena, enb, pwm, cs_dis). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 9. switching (vcc = 13 v, rload = 6.5 w) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 10. protections and diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 table 11. current sense (9 v < vcc < 18 v) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 table 12. truth table in normal operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 table 13. truth table in fault conditions (detected on outa). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 table 14. electrical transient requirements (part 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 table 15. electrical transient requirements (part 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 table 16. electrical transient requirements (part 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 table 17. so-16n mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 table 18. document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 list of figures VNH5250AS-E 4/18 docid025102 rev 2 list of figures figure 1. block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 figure 2. configuration diagram (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 figure 3. current and voltage conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 figure 4. definition of the high-side switching times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 figure 5. so-16n package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 docid025102 rev 2 5/18 VNH5250AS-E block diagram and pin description 17 1 block diagram and pin description figure 1. block diagram table 2. block description name description logic control allows the turn-on and the turn-off of the high-side and the low-side switches according to the truth table. undervoltage shuts down the device for battery voltage lower than 5 v. high-side and low-side clamp voltage protect the high-side and the low-side switches from the high voltage on the battery line. high-side and low-side driver drive the gate of the concerned switch to allow a proper r ds(on) for the leg of the bridge. current limitation limits the motor current in case of short circuit. high-side and low-side overtemperature protection in case of short-circuit with the increase of the junction temperature, it shuts down the concerned driver to prevent degradation and to protect the die. low-side overload detector detects when low-side current exceeds shutdown current and latches off the concerned low-side. logic v cc out a diag a / en a in b in a gnd a cs diag b / en b ls a clamp hs a ls a hs a hsa_overtemperature hsb_overtemperature u v current limitation a out b gnd b ls b hs b current driver hs a driver ls b driver hs b driver clamp hs b clamp ls b clamp ls a 1/k 1/k limitation b overload detector b overload detector a power limitation fault detection lsb_overtemperature lsa_overtemperature gapgcft00647 block diagram and pin description VNH5250AS-E 6/18 docid025102 rev 2 figure 2. configuration diagram (top view) fault detection signalizes the abnormal behavior of the switch (output shorted to ground or output shorted to battery) by pulling down the concerned enx/diagx pin. power limitation limits the power dissipation of the high-side driver inside safe range in case of short to ground condition. table 3. pin definitions and functions pin n symbol function 1, 16 gnd a source of low-side switch a 2, 15 out a source of high-side switch a / drain of low-side switch a 3in a clockwise input 4, 5, 12 v cc power supply voltage 6in b counter clockwise input 7, 10 out b source of high-side switch b / drain of low-side switch b 8, 9 gnd b source of low-side switch b 11 en b status of high-side and low-side switches b 13 cs output of current sense 14 en a status of high-side and low-side switches a table 4. pin functions description name description v cc battery connection. gnd power ground. out a out b power connections to the motor. table 2. block description (continued) name description 6 2 1 * 1 ' $ 2 8 7 $ , 1 $ 9 & |